So my tachometer is not working everything else works. After days searching I found a lot of info to help me pinpoint the problem but I came up short handed. The wire diagram doesnt help me either.

I have done all of this per searching threads-

1- Checked the YELLOW/BLUE wire off the ecu- IT HAS POWER
2- Checked my EMS and it shows the RPMs on the log.
3-Checked the YELLOW/BLUE wire off the tachometer clip off the cluster- NO POWER
4- Removed the tachometer off the cluster and inspect the board- NO DAMAGE

So I used my handy test light and checked the 3 phillips head srews that hold the tach in place on the cluster. Looking at it from the board rear the top screw is ground. The left screw is 12v I think... and the right screw has no power what so ever. This is with the car running, clip in the harness and it doesnt show anything.

I will be searching some more and will be on the forum for the next couple of hours so if you are a expert drop me some feedback

 

Have you check your circuit board on the speedo? The speedo powers and send the signal to the tach.

Mine looks like this

 

yup and it was fine.

Well I looked at my EEMS wire diagram and I never had the wire hooked to the output for the tach. Until I find the issue what I did is run my tach output from my standalone straight to the back of the tach.

I hooke the wire to the right screw and now I have my tach working again.

Does anyone see an issue with me running my tach output wire from my standalone direct to the right screw behind the tach?

 

Heres where i ran my standalone tach sigal wire in order for my tach to work again.